lix/src/nix/log.cc
Eelco Dolstra 5b86451f02
Add a "nix log" command
This replaces "nix-store --read-log". It checks the local store and
any configured substituters for the requested logs.
2017-03-15 16:48:29 +01:00

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#include "command.hh"
#include "common-args.hh"
#include "installables.hh"
#include "shared.hh"
#include "store-api.hh"
using namespace nix;
struct CmdLog : StoreCommand, MixInstallables
{
CmdLog()
{
}
std::string name() override
{
return "log";
}
std::string description() override
{
return "show the build log of the specified packages or paths";
}
void run(ref<Store> store) override
{
auto elems = evalInstallables(store);
PathSet paths;
for (auto & elem : elems) {
if (elem.isDrv)
paths.insert(elem.drvPath);
else
paths.insert(elem.outPaths.begin(), elem.outPaths.end());
}
auto subs = getDefaultSubstituters();
subs.push_front(store);
for (auto & path : paths) {
bool found = false;
for (auto & sub : subs) {
auto log = sub->getBuildLog(path);
if (!log) continue;
std::cout << *log;
found = true;
break;
}
if (!found)
throw Error("build log of path %s is not available", path);
}
}
};
static RegisterCommand r1(make_ref<CmdLog>());